/Engine/Source/Editor/Sequencer/Public/ISequencerModule.h
Register a sequence editor for the specified type of sequence. Sequence editors provide editor-only functionality for particular sequence types.
[FDelegateHandle](API\Runtime\Core\Delegates\FDelegateHandle) RegisterSequenceEditor ( [UClass](API\Runtime\CoreUObject\UObject\UClass) * SequenceClass, [TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [FMovieSceneSequenceEditor](API\Editor\Sequencer\FMovieSceneSequenceEditor) > && InSequenceEditor )